A group has claimed responsibility, a self-described "grassroots independent organization committed to educating voters to support Governor Mike Huckabee for the Republican Nomination for President of the United States" and notes that they aren't "authorized by any candidate or candidate's committee." Huckabee says he doesn't approve of their tactics.(via)
The firm making the calls, ccAdvertising, has also done about $53,000 worth of work for the Romney campaign. Gabriel Joseph, the head of ccAdvertising, donated $1,000 to the Romney campaign on June 11.